Cyperus tenuifolius (Steud.) Dandy, Cat. Vasc. Pl. S. Tome 363 1944. (syn: Kyllinga tenuifolia Steud.);
Tropical & S. Africa, Indian Subcontinent to Indo-China and Singapore: Angola, Benin, Burkina, Cameroon, Central African Repu, Chad, Eritrea, Ethiopia, Gabon, Guinea, India, Ivory Coast, Kenya, Liberia, Malaya, Mali, Mauritania, Myanmar, Namibia, Niger, Nigeria, Senegal, Somalia, Sri Lanka, Sudan, Tanzania, Togo, Uganda, West Himalaya as per POWO;

Which sedge is this?: 3 images- 1 high res.
Bhopal; black soil; 7/7/2021

Cyperus dubius Rottb. ??

Looks more like Kyllinga species. Check further for the species ID.

Yes it’s Kyllinga,

Can be Kyllinga tenuifolia Steud. [= Cyperus tenuifolius (Steud.) Dandy]



References: POWO  Catalogue of Life  The Plant List Ver.1.1  WCSP  IPNI  GBIF (High resolution specimens)
On the identity and occurrence of Cyperus pseudoalatus and Cyperus richardii (Cyperaceae) in India– Prasad V.P.- Rheedea Vol. 31(2): 85–88 (2021) (Abstract: Cyperus pseudoalatus (Wad.Khan & R.D. Taur) Kottaim. (Kyllinga pseudoalata Wad.Khan & R.D.Taur) is reduced to a synonym of Cyperus tenuifolius (Steud.) Dandy, with critical discussion. Based on a careful scrutiny of the protologues and type images of Kyllinga bulbosa P.Beauv., K. tenuifolia Steud. and Cyperus richardii Steud., it is confirmed that the plants reported earlier from India and Sri Lanka as Kyllinga bulbosa (Cyperus richardii) are likely misidentified and represent Cyperus tenuifolius.)

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